MiG-21PF Walkaround by Roy McCartey
This is a collection of excellent picture of MiG-21PFM details.

The Fuel System

Includes schematics, cockpit indications etc.

Cabin Pressurization and Environmental Control System

The MiG-21 Airborne Radar
Features the RP-21 as well as the RP-22.

The Engine R-11-37F2-S

Ejection Seat

For more on MiG-21systems visit Tamas Piri's "Fishbeds' Homepage"! Tamas is a citizen of Hungary.